TL;DR
Let's Do It Together!
Step 1: Access Theme Editor
Log into your Shopify account.
Under Sales Channels, click on Online store.
From the list of themes, find the theme you want to edit.
Click the customize button beside the selected theme.
You will be redirected to the theme editor for your selected theme.

Step 2: Add Announcement Bar
In the theme editor, look for the option to add announcement bar.
If not present, click add section and find the announcement bar option to add it.
Now you have added the announcement bar to your theme.

Step 3: Create Announcements
Click on the add announcement button to create multiple announcements.
Edit the announcement text, alignment, color, and add a link if needed.
You can customize the announcement according to your preferences.

